Hi All,

I'm traveling one way from LON to MEL. I see that BA's excess luggage allowance for one extra bag is extremely competitive. However, this is a code share flight as BA don't fly direct to MEL from LHR so I will be going on a Qantas flight. Their policy however, is not as good as BA's. If I bought the ticket on BA and paid for the excess baggage online through BA (if this is possible) will Qantas have to accept the fact that I've paid for the baggage?
Or do I have to go along with Qantas' policy?